Image CDN Background Colour Controls

Fitting artwork into a fixed frame leaves space around it, and transparent logos take on whatever sits behind them. The image CDN now accepts a background colour on transformation URLs, so you can fill that space with a colour of your choosing and flatten transparency onto it, and the image looks the same for every visitor regardless of which format their browser negotiates.

Fill the frame with your colour

When an image is fitted inside a frame rather than cropped to it, the new background parameter paints the surrounding space instead of leaving it empty. Bare hex values like F00 or FF0000 work directly, the hash-prefixed form is also accepted, and letter case is normalised, so equivalent values resolve to a single cached variant rather than duplicates.

Consistent results in every format

With a background colour supplied, the CDN flattens transparency onto that colour before resizing, so a transparent PNG renders identically in modern formats and the JPEG fallback alike. Without the parameter, transparency is preserved exactly as before, so nothing changes for existing URLs.